Stone press roll



l llll II J. W. VEDDER.

STONE PRESS ROLL.

AUG.30,1921.

PatentedSept. 26, 1922.

APPLICATION FILED Patented Sept. 26, 1922.

UNITED; STATES PATENT OFFICE.

STONE PRESS vIEI'OII'JL.

Application filed August 30, 1921. Serial 110. 496,820.

To all whom it may concern:

Be it known that I, JOHN WARREN VED- DER, a citizen of the UnitedStates, and resident of Worcester, Massachusetts, have invented new anduseful Improvements in Stone Press Rolls, which invention is fully setforth in the following specification.

This invention relates to rolls for paper making and especially to stonepress-rolls by which the paper is pressed after it leaves thecouch-rolls in paper making machines. Generally the object is to providemeans, which may be effectivelyapplied with facility and minimum effort,for mounting and securing the stone-body portion of stone-rollsupon themetal shaft thereof.

It has been heretofore proposed to employ at each end of the stone-bodyportion of a stone-roll a bushing closely fitting and making rotatablescrew-threaded engagement with the metal shaft of the roll, said bushingbeing exteriorly tapered to fit the correspondingly flaring orcountersunk outer end of the bore of the stone-body. In the use of suchmeans the bushin must be rotated so that by its screw-threadedengagement with the shaft it will be moved along the latter intoengagement with the stone-body. It has been found that'the attainment ofa tight fit with such means requires much effort and care because of thedifficulty of rotating the bushin while its exterior surface is incontact with the opposing stone surface of the bore of the stone-body,the stone surface gripping the metal surface and opposing rotation ofthe bushing just as a piece of emery cloth gripped around thecylindrical surface of a piece of metal opposes rotation of the latter.Hence a further object of this invention is to provide a bushing adaptedto be positioned tightly in place between the metal shaft and thestone-body with approximately no relative rotation of the two, but bymovement of the bushing longitudinally of the shaft and stone-body.

A further object is the provision of a nonrotating bushing which 'by itsmovement longitudinally .of the shaft in positioning the bushing willbecaused to expand into tight engagement with the inner surface of the endof the bore of the stone-body portion of the roll; and this object ispreferably attained by the cooperationof a tapered surface on the shaftwith an interiorly tapered bore of the bushing, whereby as the bushingis moved longitudinally of the axis of the shaft it will be caused toexpand in the bore of the stone-body. A further object is the provisionof a sleeve or ring in screw-threaded engagement with the shaft adaptedto engage the end of the bushing in assisting in forcing the same to,and in securing it in, its final position. A still further object is theprovision of a collar adapted to be screw-threaded on to said sleeve orring after the latter has been put in place, said collar having an innersurface shaped to closely lit the end face of the stone-body, sucharrangement permitting positioning of the collar in contact with thestone-body independently of the positioning of the bushing in engagementtherewith.

The aforesaid and other objects and advantages are attained bythepresent invention, what Lnow regard as the preferred embodiment of whichis illustrated in the accompanying drawing wherein-- 7 Fig.1 is a viewpartly in longitudinal section and partly in elevation, and

Figs. 2 and 3 are end and side elevations respectively-of the expansiblebushing such as interposed between the shaft and the stone-body at eachend of the latter.

Referring to the drawing, 5 is the stonebody portion of the roll formedwith an axial bore, aportion 6 of said bore at each end of thest0ne-body being preferably of slightly larger uniform diameterthroughout than the middle section of the bore. A metal shaft 7,preferably tubular, extends through the bore of the stone body andprojects at both ends to constitute bearings on the roll adapted toengage suitable supporting bearings not shown. Since the drawingillustrates similar means at both ends of the stone-body for mountingand securing the same upon the shaft, description of such means at oneend of the roll only will suffice. Shaft 7 is formed with an exteriorlyscrewthreaded section or part 8 and adjacent thereto toward themiddle ofthe shaft with a tapered section or part 9. 10 is a bushing of uniformexterior diameter normally slightly smaller than the interior diameterof the end section 6 of the bore of the stone body portion 5, and havinga tapering bore forming an interior surface conforming to the taper ofthe part 9 of the shaft. The bushing 10 is formed with threelongitudinal slots spaced equidistant around and cut through the wall ofthe bushing, the slot 11 extending the full length of the bushing,

while the ot 12 ezytends'from the left, hand end tovvit in 'a shortdistance of the right hand end of the bushing, and the slot'1'3 extendsfrom a i ght hand-end: qw thia short distance of the left hand end ofthe bushing By such slotting the bushing. is

' rendered expansible. 14 is a ring or sleeve interiorly screw-threaldedfor engagement with the threaded part 80f the shaft, and

also exteriorly so'rew-threaded for engage: mentby-the interiorscrew-threads of a collar315, the inner face of which'is shaped toconform to the end-surface of the stone-body with which it engages. i aY asembling the parts thebushin' 10 is fi'rst putin place by forcing itlongitudinally along-the tapered part 9 ofth'e shaft until thereiiufilting expansion of the bushing brings its exterior surface intotight engage ment 'with the interior surface ofjthe end portion 60f thebore of the stone-body 5.

'uch longitudinal'movement ofbushing 10 maybe -efiect'edby hammering, orby rotating ebllar 14 against the end of the bushin or by both suchmethods, the collar 14; when set tightly against the end of the bushingalso serving to secure the bushingin the de- Sl-IBdwPOSitlOIl. It willbe [noted that in so positioning the bushing 10no rotationthereof'isrequired and thus avoid the diiheulty and effort experienced withbushings which must be rotated and in Whichthe friction and grippingaction between the opb'sing and contacting surfaces of stone-b" yandmetal bushing must be overcome to bring the bushing to the "desiredposition. A pin 16 may: be employed to secure collar 14 against rotationafter it has been tightly set against the end of the bushing Collar 15is next applied and rotated until its inner face is tightly set ageingthe endsurface of thestone-body. A pin 17ma y be then'put plane to lockthe collar against rotation. WhatIolaim-is:---

1. In roll, the combination of a stone body havingg a central bore, ametal shaft extending through said borefiandprojectin'g at both ends ofthe stone body to constitute bearings on the roll -for;engagement withsupporting bearings and means securing said stonebody upon said shaft:said means including-at one or both endsof the roll a bushing or sleeveon the shaftfitting in the e'ndof the boreof the stone body member andhaving an exterior surface adapted to tightly engage the opposingsurface of said bore. and said bushing having. an interior surface.adapted 'to"closely fit the opposing surface of theishaftmember, theo'pposing 1 60 surfaces of I said bushing andL-of onezpf said membersbeing correspondingly tapered and said.- bushing being movablelongitudinally ofr the shaft without rotary; movement relative tolthesto'ne body in bringing thebushtorits position between: thei shaft 2 andbody havin stone bod and,. meansj e" 'n the, shaft mu ida riid to bebroeh i iifi d nga'gement with" the end of the bus ing without engagingthe stone to secure-the bushing in place.

2. In. a roll, the combination of a stone a central bore, a metal shaftextending through said bore and projecting at both ends of the stonebody to constitute bearings on th'e roll for engagement with supportingbearings, and means securing said stone upon said shaft said meansincluding-intone or both ends of the rollii bushing or sleeve on theshaft fitting in the end "of the h re of the stonebody member and havingan exterior surface 'adapt'ed to tightly engage the opposing surface ofsaid bore and said bushing having an interior surface adaptedto 'closelyfit the opposing tending through said bore and projecting at a both endsofethe stone body to constitute hearings on the roll forengagement withsupporting bearings, and means*securing said stone bod-y upon said shaftsaid neans including at one or both ends 'of the roll an eipi'xiisiblebushing or sleeve on the shaft fitting in the end of the bore of thestone body member and having an exterior surface adapted toti htlyengage {the opposing surface of sai bore and said bushinghavinganinterior surface adapted to closelyfit the opposing surface ofthe shaftmernber, the opposing sun-faces of saidbushing and one saidmembers "being cor-respondinglytapered and said bushi'n being movablelongitudinally of the shaft without rotary movement relative to 't hestdne body in bringing and expanding the bushing. to

position between the shaft and stone body.

4:. In a roll, thecombinationof a stone'body having a central bore, ametal shaft extendin' throi'tgh 'said'bofe "and projectin at both encsof the stone body to; constitute bearings on the roll for engagementwithsu-pportin bearings,v and means securing stone upon said shaft saidmean including at one or both ends of the roll an expansiblebushing-orsleeve on the shaft fitting in the end "of the bore of the stone body:member and having an exterior surface adapted to tightly engagetheyoppos ing surface of said bore and said bushing having an interiorlytapered surface adapted to fit and cooperate with a correspondinglytapered surface on the shaft whereby said bushing by longitudinalnon-rotary movement relative to the stone body may be moved and expandedto its position between the shaft and stone body.

5. In a roll, the combination of a stone body having a central bore, ametal shaft extending through said bore and projecting at both ends ofthe stone body to constitute bearings on the roll for engagement withsupporting bearings, and means securing said stone body upon said shaftsaid means including at one or both ends of the roll an expansiblebushing or sleeve on the shaft fitting in the end of the bore of thestone body member and having an exterior surface of aproximately uniformdiameter throughout adapted to tightly engage a corresponding opposingsurface of said bore and said bushin having an interiorly taperedsurface adapted to fit and cooperate with a correspondingly taperedsurface on the shaft whereby said bushing by longitudinal non-rotarymovement relative to the stone body may be moved and expanded to its1position between the shaft and the stone boc y. i

6. In a roll, the combination of a stone body having a central bore, ametal shaft extending through said bore and projecting at both ends ofthe stone body to constitute bearings on the roll for engagement withsupporting bearings, and means securing said stone body upon said shaftsaid means including at one or both ends of the roll an expansiblebushing or sleeve on the shaft fitting in the end of the bore of thestone body member and having an exterior surface adapted to tightlyengage the opposing surface of said bore and said bushing having aninteriorly tapered surface adapted to lit and cooperate with acorrespondingly tapered surface on the shaft whereby said bushing bylongitudinal non-rotary movement relative to the stone body may be movedand expanded to its face ing the stone body to secure the bushing inplace.

7. In a roll, the'combination of a stone body having a central bore ametal shaft extending through said bore and projecting at both ends ofthe stone body to constitute bearings on the roll for engagement withsupporting bearings,- and means securing said stone body upon said shaftsaid means including at one or both ends of the roll an expansiblebushing or sleeve on the shaft fitting in the end of the bore of thestone body member and having an exterior surface adapted to tightlyengage the opposing surof said here and said bushing having aninteriorly tapered surface adapted to fit and cooperate with acorrespondingly tapered surface on the shaft whereby said. bushing bylongitudinal non-rotary movement relative to the stone body may be movedand expanded to its position between the shaft and stone body, a ringscrewthreaded on the shaft and adapted to be broughtinto engagement withthe end of the bushing without engaging the stone body to secure thebushing in place, and a collar making screw-threaded engagement with theexterior surface of said ring and adaptcd to engage the end surface ofsaid stone body.

8. In a roll, the combination of a stone body having a central bore, ashaft extending through said bore, an expansible bushing surrounding theshaft and adapted to be positioned in the end of the bore of the stonebody, and means acting upon longitudinal movement of the bushingrelative to the shaft and stone body and without rotary movement of thebushing to expand the same into tight engagement with the surroundingwall of the bore of the stone body.

In testimony whereof I have signed this specification.

JOHN WARREN VEDDER.

